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The inline asm operands must be parsed from the first flag, you cannot assume that an immediate operand preceeding a register use operand is the flag. PowerPC "m" operands are represented as (flag, imm, reg) triples. isRegTiedToDefOperand() would incorrectly interpret the imm as the flag. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76101 91177308-0d34-0410-b5e6-96231b3b80d8
17 lines
605 B
LLVM
17 lines
605 B
LLVM
; RUN: llvm-as < %s | llc -march=ppc32 -verify-machineinstrs
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; Machine code verifier will call isRegTiedToDefOperand() on /all/ register use
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; operands. We must make sure that the operand flag is found correctly.
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; This test case is actually not specific to PowerPC, but the (imm, reg) format
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; of PowerPC "m" operands trigger this bug.
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define void @memory_asm_operand(i32 %a) {
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; "m" operand will be represented as:
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; INLINEASM <es:fake $0>, 10, %R2, 20, -4, %R1
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; It is difficult to find the flag operand (20) when starting from %R1
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call i32 asm "lbzx $0, $1", "=r,m" (i32 %a)
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ret void
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}
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